I got the update yesterday morning. Things that will take some adjustment for me.
1. Status/Notifications moved to the top of the tablet. They used to be in the bottom right corner. Now that they are on the top of the tablet, the icons are much smaller than they were.
2. The Back, Home, and Recent Apps navigation soft buttons are no longer on the bottom left of the tablet. They are now centered on the bottom of the tablet.
Other things I noticed.
1. The screenshot soft button is no longer available, not a big deal since I had turned it off, but I had to Google how to take a screenshot now that it isn't available (touch Power and Volume Down buttons simultaneously).
Is there a way to change it so you don't have the phone UI on the tablet and get the tablet UI back? Here are some shots that outline it and are indicative of the phone UI....
Galaxy Tab 2 7.0 with Jelly Bean
Galaxy Tab 2 7.0 with Ice Cream Sandwich